Question

What is the measure of angle A in the triangle?
(2x-10)
70%B
Enter your answer in the box.
| M (x + 30)

Answer 1

Answer:

A = 50

Step-by-step explanation:

The sum of the angles of a triangle is 180 degrees

A+B+C =180

2x-10 + 70 + x+30 = 180

Combine like terms

3x +90 = 180

Subtract 90 from each side

3x +90-90 = 180-90

3x= 90

Divide each side by 3

3x/3=90/3

x =30

We want to find A

A =2x-10

   = 2*30 -10

   =60-10

  =50

Answer 2

Answer:

m<A = 50

Step-by-step explanation:

2x - 10 + 70 + x + 30 = 180

3x + 90 = 180

3x = 90

x = 30

* plug back in*

m <A = 2(30)-10

m <A = 50